JavaScript Chart.js - Custom data formatting to display on tooltip

Question

I have looked at various documentation and similar questions on here, but cannot seem to find the particular solution. Apologies if I have missed anything obvious or have re

Answer 1

tooltips: {
    callbacks: {
        label: function (tooltipItem) {
            return (new Intl.NumberFormat('en-US', {
                style: 'currency',
                currency: 'USD',
            })).format(tooltipItem.value);
        }
    }
}